Some, merely to contradict what I had said, did not scruple to cast doubt upon things they had seen with their own eyes again and again.

To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.

Holy Writ was intended to teach men how to go to Heaven not how the heavens go.

I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.

With regard to matters requiring thought: the less people know and understand about them, the more positively they attempt to argue concerning them.

The number of the fixed stars which observers have been able to see without artificial powers of sight up to this day can be counted. It is therefore decidedly a great feat to add to their number, and to set distinctly before the eyes other stars in myriads, which have never been seen before, and which surpass the old, previously known stars in number more than ten times.

The difficulties in the study of the infinite arise because we attempt, with our finite minds, to discuss the infinite, assigning to it those properties which we give to the finite and limited; but this... is wrong, for we cannot speak of infinite quantities as being the one greater or less than or equal to another.