Few things tend more to alienate friendship than a want of punctuality in our engagements. I have known the breach of a promise to dine or sup to break up more than one intimacy. – William Hazlitt
If instead of a gem, or even a flower, we should cast the gift of a loving thought into the heart of a friend, that would be giving as the angels give. – George MacDonald
In teaching man, experimental science results in lessening his pride more and more by proving to him every day that primary causes, like the objective reality of things, will be hidden from him forever and that he can only know relations. – Claude Bernard