If you feel envious of others, you will never enjoy life. You will always find someone else to envy regardless of what you yourself have. There will invariably be another person who is greater than you in either wisdom, wealth, or power. Unless you stop comparing yourself with others, your entire life will be full of needless pain and suffering.
Solitary we must be in life's great hours of moral decisions; solitary in pain and sorrow; solitary in old age and in our going forth at death. Fortunate the man who has learned what to do in solitude and brought himself to see what companionship he may discover in it, what fortitude, what content.
The life of a person who demands and pursues approval is full of pain and suffering. Even if he does receive a large amount of approval, he will still demand more. We can say with certainty that not everyone will honor him as much as he would like and he will cause himself much self-imposed misery.
The desire to serve others is the highest impulse of the human heart and the rewards of such service are beyond measure. If you wish to taste this, then just do it. Just take one step... You will see that the tyranny of self-concern, worry, and trivial pursuits can be released from your life with that single step. It doesn't really matter what you do, it only matters that you do it.
The envious man is in pain upon all occasions which ought to give him pleasure. The relish of his life is inverted; and the objects which administer the highest satisfaction to those who are exempt from this passion give the quickest pangs to persons who are subject to it. All the perfections of their fellow creatures are odious. Youth, beauty, valor and wisdom are provocations of their displeasure. What a wretched and apostate state is this! to be offended with excellence, and to hate a man because we approve him!
If you are distressed by anything external, the pain is not due to the thing itself but to your own estimate of it; and this you have the power to revoke at any moment.