English Basic Explanation - Chapter 37
Psalm 37 is essentially an appeal by David not to be lured or misled by the successes of the wicked. People who earn success, fame and fortune through deceit, dishonesty and exploitation of the weak should not be envied, because their successes are short-lived. Contrary to common perception, it is the righteous, ethical men who will "inherit the earth" (verses 9, 11) and enjoy true blessing and prosperity. Despite the evils the wicked plot against the righteous, the righteous will ultimately emerge victorious.
David draws upon empirical evidence in imploring the reader to withstand and overcome the temptation to support the wicked. He observes that from his youth through his old age, he has never witnessed "an abandoned Tzadik" who lacks the means to support his family (verse 25). To the contrary, the righteous seem to always have enough with which to not only feed their own families, but to lend to those in need (verse 26). Conversely, David testifies to having seen firsthand successful, influential tyrants who vanish without leaving any mark on the world (verses 35-36).
The success and prosperity of the wicked pose a formidable challenge to one's faith and commitment to the Torah's ideals. Many people cannot help but think of how greener the grass is on the other side of the hill, how much they could achieve and enjoy by shaking themselves free of what might at first seem like the heavy burden of Mitzva observance. David therefore implores us to overcome this instinct and remember the incalculable benefits of observance and dangers of sin. Rather than be misled by the power and wealth of the wicked, we must instead place our faith and trust in God and the blessings He promises to bestow upon those who loyally follow His ways.