Every human actions becomes dangerous when it is deprived of human feeling. When they are performed with feeling and respect for human values, all activities become constructive.
When you were born you were crying and everyone else was smiling. Live your life so at the end, your're the one who is smiling and everyone else is crying.
To live in the presence of great truths and eternal laws, to be led by permanent ideals - that is what keeps a man patient when the world ignores him, and calm and unspoiled when the world praises him.