Do not be sad – Repel anxiety

Idleness is destructive, and most people who suffer from worries and anxieties are the same people who are idle and inactive. Rumors and gossips are the only dividends for those that are bankrupt of meaningful and fruitful work.

Apply yourself to something and word hard at it. Read, recite, and glorify your lord with praises. Write, visit friends, and benefit from your time. In short, do not give a single minute away to idleness. The day that you do will be the day that anxieties and worries will find their way into your life. Superstition and evil whispers will enter your mind, allowing you to become a playground for the games of the devil.

Do not grieve over the person who forgets or denies the favors you once gave to him, for your desire should be solely for the reward of Allah.

Perform righteous deeds purely and sincerely for the pleasure of Allah, and do not expect either congratulation or gratitude from any person. Do not take it to heart if you confer a favor upon someone and he then turns out to be ungrateful, showing no sign of appreciation for what you have done. Seek your reward from Allah. Allah says of His righteous slaves:

(They seek Bounties from Allah and His pleasure.) (Qur’an 59:8)

(Say: ‘No reward do I ask you for this’...) (Qur’an 25:57)

(And have in his mind no favor from anyone for which a reward is expected in return.) (Qur’an 92:19)

([Saying]: ‘We feed you seeking Allah’s Countenance only. We wish for no reward, nor thanks from you.) (Qur’an 76:9)

So make your dealings with Allah alone, as he is the One Who rewards people for good deeds. He gives and he bestows, or He punishes and He takes to account, being pleased with those who do well and angry with those who do evil.
Martyrs were killed in Qandahar, and ‘Umar (may Allah be pleased with him) asked the companions, “Who was killed?” They mentioned some names to him, and then they said., “And people whom you do not know.” ‘Umar’s eyes filled with tears and he said, “But Allah knows them.”

A pious person fed the best and finest of food to a blind man. His family said to him, “This blind man does not know what he is eating (so give him something of lower quality).” He replied, “But Allah knows!”

Since Allah knows your deeds, knows of the good you do and the help you give to others, remain carefree and untroubled about what people think.