The situation in view here is that of a person who impulsively pledges something to God and then, upon reconsidering, wishes that he had not done so (cf. Ecclesiastes 5:5; Mark 7:11). It is better to wait to make the pledge, until one thinks through the implications of the decision carefully. In a larger application, we should avoid all unconsidered action. [1][source]
"Too many people will make promises under the inspiration of the hour only later to realize that they have strapped themselves; they then try to go back on their word." [2][source]
Context Summary
Proverbs 20:16-30 - "the Glory Of Young Men"
What a wonderful thought is given in Proverbs 20:27! We stand like a row of unlighted candles until God's Spirit kindles us. Has the Divine Nature ever bent over your nature, communicating to it its glow and fire? If so, be very careful that no puff of wind shall extinguish that sacred spark; and see that it is supplied with the daily nutriment it requires. The whole paragraph seems to indicate the clear shining of this light, which must not be hidden under a bushel, but placed on the stand, that it may give light to all who come in. So let your light shine that men may admire neither the lamp-stand nor the wick, but the glory of the light of God radiating from you.
Such a soul will be true, Proverbs 20:17; will be wise, Proverbs 20:18; will eschew tale-bearing and flattery, Proverbs 20:19; will honor the parents that gave it birth, Proverbs 20:20; will win a good inheritance by patient industry, Proverbs 20:21; will wait on the salvation of God, Proverbs 20:22; will accept God's guidance, Proverbs 20:24; will follow mercy and truth, Proverbs 20:28; will be strong, and pure, and faithful. Such should be the glory of all young men and maidens if their old age shall be beautiful, Proverbs 20:29. [source]