Unrequited love is the meaning of life. We’re here to love but not to be loved, to give but not receive. Our mission in this world is to improve humanity and leave a better history than we found. Only selfless love has such power. Only love without interest or expectation of reward can change human beings... To give love without receiving love is the truest love and brings the greatest happiness there is in life.
There is no such thing as a "self-made" man. We are made up of thousands of others. Everyone who has ever done a kind deed for us, or spoken one word of encouragement to us, has entered into the make-up of our character and of our thoughts, as well as our success.
If we desire to live securely, comfortably, and quietly, that by all honest means we should endeavor to purchase the good will of all men, and provoke no man’s enmity needlessly; since any man’s love may be useful, and every man’s hatred is dangerous.
The first real mental illumination I remember to have experienced was when I saw that the universe exists in each of its individual atoms - that is, the universe is the result of a few simple processes infinitely repeated. When a drop of water has been mathematically measured, every principle will have been used which would be called form in the measurement of the heavens. All life on the globe is sustained by digestion and assimilation; when by voluntary and traumatic action these stop death follows. The history of an individual mind is the history of the race. Know one thing in its properties and relations and you will know all things.
Real joy seems dissonant from the human character in its present condition; and if it be felt, it must come from a higher region, for the world is shadowed by sorrow; thorns array the ground; the very clouds, while they weep fertility on our mountains, seem also to shed a tear on man’s grave who departs, unlike the beauties of summer, to return no more; who fades unlike the sons of the forest, which another summer beholds new clothed, when he is unclothed and forgotten.
Life is something you measure not in years but in precious moments - and in how you value those moments. The responsibility for making such moments meaningful is yours alone. There are no definitions of failure or success except the ones you specify for yourself. You are the meaning of your own life.
Illusion and self-deception stand in the way of an honest, penetrating and fearless self-appraisal. Though it would appear that we have access to the innermost core of our individual being, and that there is nothing in the world with which we are on more intimate terms than our own self, the self remains an elusive object of knowledge and understanding.