We find the same wonderful truth in the OT.
Just think of this word "Good" as in good seed. This word, the strongest word used of 'good' means "a harmonious completeness." There are many people in the world who are considered "good" and we would have to acknowledge that they do good things, show love and kindness to others and yet they need to be born again before they can enter heaven. That puzzles many. There is something 'incomplete' about there goodness. There is something lacking. They do goodness is marred by a desire to gain favour with others, to gain the praise of the world or even to try to get to heaven. That makes their goodness faulty, incomplete!
The Christian seeks to do good "to the glory of God"! That makes their goodness complete and whole!
Look at these verses as we further consider the good that God's people do in this world. "And Laban said unto him, I pray thee, if I have found favour in thine eyes, tarry: for I have learned by experience that the LORD hath blessed me for thy (Jacob's) sake," Genesis 30:27.
"And it came to pass from the time that he had made him overseer in his house, and over all that he had, that the LORD blessed the Egyptian's house for Joseph's sake; and the blessing of the LORD was upon all that he had in the house, and in the field," Genesis 39:5.
"And Elisha said, As the LORD of hosts liveth, before whom I stand, surely, were it not that I regard the presence of Jehoshaphat the king of Judah, I would not look toward thee (Jehoram the son of Ahab), nor see thee," 2 Kings 3:14.
It is made clearer when we consider the world's view of the Blessed Saviour. "He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from him; he was despised, and we esteemed him not," Isaiah 53:3.
"But I am a worm, and no man; a reproach of men, and despised of the people. All they that see me laugh me to scorn: they shoot out the lip, they shake the head, saying, He trusted on the LORD that he would deliver him: let him deliver him, seeing he delighted in him." Psalm 22:6-8. As with Christ, so with the believer!
How undervalued are the people of God. "Being defamed, we intreat: we are made as the filth of the world, and are the offscouring of all things unto this day," 1 Corinthians 4:13. "But call to remembrance the former days, in which, after ye were illuminated, ye endured a great fight of afflictions; partly, whilst ye were made a gazingstock both by reproaches and afflictions; and partly, whilst ye became companions of them that were so used," Hebrews 10:32-33.
"We are fools for Christ's sake, but ye are wise in Christ; we are weak, but ye are strong; ye are honourable, but we are despised. Even unto this present hour we both hunger, and thirst, and are naked, and are buffeted, and have no certain dwellingplace; and labour, working with our own hands: being reviled, we bless; being persecuted, we suffer it: being defamed, we intreat: we are made as the filth of the world, and are the offscouring of all things unto this day," 1 Corinthians 4:10-13.