Leap, and the net will appear. motivation
If you think you can do it, you can. motivation
Science has done more for the development of western civilization in one hundred years than Christianity did in eighteen hundred years. science
If we take science as our sole guide, if we accept and hold fast that alone which is verifiable, the old theology must go. being alone & science
A man can get discouraged many times but he is not a failure until he begins to blame somebody else and stops trying. failure
To me - old age is always ten years older than I am. aging & birthday
Joy in the universe, and keen curiosity about it all - that has been my religion. religion
I go to nature to be soothed and healed, and to have my senses put in order. nature
The lure of the distant and the difficult is deceptive. The great opportunity is where you are. greatness
The secret of happiness is something to do. happiness
Travel and society polish one, but a rolling stone gathers no moss, and a little moss is a good thing on a man. society & travel
I seldom go into a natural history museum without feeling as if I were attending a funeral. history
Nature teaches more than she preaches. There are no sermons in stones. It is easier to get a spark out of a stone than a moral. nature
The smallest deed is better than the greatest intention. wisdom
A man can fail many times, but he isn't a failure until he begins to blame somebody else. failure
To treat your facts with imagination is one thing, to imagine your facts is another. imagination
The Kingdom of Heaven is not a place, but a state of mind. religion