Sometimes you will never know the value of a moment until it becomes a memory.
It is neither good nor bad, but thinking makes it so.
Moderation in temper is always a virtue; but moderation in principle is always a vice.
Act as if the maxim of your action were to become through your will a general natural law
There are things known and there are things unknown, and in between are the doors of perception.
No man has any natural authority over his fellow men.
There is geometry in the humming of the strings. There is music in the spacing of the spheres.
In a good bookroom you feel in some mysterious way that you are absorbing the wisdom contained in all the books through your skin, without even opening them.
If you don't stand for something you will fall for anything.
Every intelligent individual wants to know what makes him tick, and yet is at once fascinated and frustrated by the fact that oneself is the most difficult of all things to know.
The more that you read, the more things you will know. The more that you learn, the more places you'll go.
The trouble with most of us is that we would rather be ruined by praise than saved by criticism.
Gravity is only the bark of wisdom's tree; but it preserves it
Realize deeply that the present moment is all you ever have.
Each problem that I solved became a rule which served afterwards to solve other problems.
Taste every fruit of every tree in the garden at least once. It is an insult to creation not to experience it fully. Temperance is wickedness.
It is better to be looked over than overlooked.
Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.
Every aquarium will eventually leak.
Between stimulus and response there is a space. In that space is our power to choose our response. In our response lies our growth and our freedom.
Strength does not come from physical capacity. It comes from an indomitable will.