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.
Whoever sets out to persuade men to accept a new idea, or one which seems to be new, not just as an idea, but as a truth that is felt, should know beforehand that the human mind is not a blank sheet, on which one an write with ease, and should not therefore grieve or despair when he finds that people do not pay attention to him.
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.
It is axiomatic that we should all think of ourselves as being more sensitive than other people because, when we are insensitive in our dealings with others, we cannot be aware of it at the time: conscious insensitivity is a self-contradiction.