If you are interested in Physics, you have heard of Max Planck. He's the starting point of modern physics in my opinion. He was a major stimulus to Einstein's work and the puzzles that Einstein struggled with until his death were directly tied to Planck's discoveries and theories. Planck's fundamental work is still highly relevant and accurate despite most of it being over 100 years old now.
Planck was very scientific and apparently also had a strong personal sense of God.
The following are quotes of his. (emphasis is mine):
(they came from here - http://en.wikiquote.org/wiki/Max_Planck)
"As a man who has devoted his whole life to the most clear headed science, to the study of matter, I can tell you as a result of my research about atoms this much: There is no matter as such. All matter originates and exists only by virtue of a force which brings the particle of an atom to vibration and holds this most minute solar system of the atom together. We must assume behind this force the existence of a conscious and intelligent mind. This mind is the matrix of all matter."
“Das Wesen der Materie” (The Nature of Matter), speech at Florence, Italy, 1944 (from Archiv zur Geschichte der Max-Planck-Gesellschaft, Abt. Va, Rep. 11 Planck, Nr. 1797)
"We have no right to assume that any physical laws exist, or if they have existed up to now, that they will continue to exist in a similar manner in the future."
The Universe in the Light of Modern Physics (1931)
"I regard consciousness as fundamental. I regard matter as derivative from consciousness. We cannot get behind consciousness. Everything that we talk about, everything that we regard as existing, postulates consciousness."
The Observer (January 25th, 1931)
"Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: Ye must have faith. It is a quality which the scientist cannot dispense with."
Where Is Science Going? (1932)
"Both Religion and science require a belief in God. For believers, God is in the beginning, and for physicists He is at the end of all considerations… To the former He is the foundation, to the latter, the crown of the edifice of every generalized world view."
Religion and Natural Science (Lecture Given 1937) Scientific Autobiography and Other Papers, trans. F. Gaynor (New York, 1949), pp. 184
Eine neue wissenschaftliche Wahrheit pflegt sich nicht in der Weise durchzusetzen, daß ihre Gegner überzeugt werden und sich als belehrt erklären, sondern vielmehr dadurch, daß ihre Gegner allmählich aussterben und daß die heranwachsende Generation von vornherein mit der Wahrheit vertraut geworden ist.
Translation: A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.
'Wissenschaftliche Selbstbiographie. Mit einem Bildnis und der von Max von Laue gehaltenen Traueransprache. 35 pp. (Leipzig, 1948). Scientific Autobiography and Other Papers, trans. F. Gaynor (New York, 1949), pp.33-34 (as cited in T.S. Kuhn, The Structure of Scientific Revolutions).
Condensed variant: Die Wahrheit triumphiert nie, ihre Gegner sterben nur aus. ~ Truth never triumphs -- its opponents just die out.
Other condensed variant: Science advances one funeral at a time.
Under these conditions it is no wonder, that the movement of atheists, which declares religion to be just a deliberate illusion, invented by power-seeking priests, and which has for the pious belief in a higher Power nothing but words of mockery, eagerly makes use of progressive scientific knowledge and in a presumed unity with it, expands in an ever faster pace its disintegrating action on all nations of the earth and on all social levels. I do not need to explain in any more detail that after its victory not only all the most precious treasures of our culture would vanish, but – which is even worse – also any prospects at a better future.
Religion und Naturwissenschaft (Leipzig, 1958)
(I must say I disagree with his extreme view of atheists in the prior quote.)
New scientific ideas never spring from a communal body, however organized, but rather from the head of an individually inspired researcher who struggles with his problems in lonely thought and unites all his thought on one single point which is his whole world for the moment.
Address on the 25th anniversary of the Kaiser-Wilhelm Gesellschaft, 10/11 January 1936. Quoted in Macrakis, Kristie Surviving the Swastika: Scientific Research in Nazi Germany (Oxford, 1993) ISBN 0-19-507010-0.
I suspect that the avowed atheists in this group will say Planck was just a victim of a religious upbringing, or of a highly religious era, or that he would have believed differently if he had lived today and knew all that we know today. I strongly disagree. He was highly rational and scientific. He had the benefit of many years of good science before him and he understood the difference between faith and proof, yet he still chose to believe in something greater than himself. Whether you call that 'something' God, or Cosmic Consciousness, or the Universe, or the Source, or All That Is, does not matter.
Planck also seemed to share the understanding that consciousness is not easily explained and could well be so deeply intertwined with the nature of reality that it could be inseparable.