"For thou wilt light my candle: the LORD my God will enlighten my darkness."
For every comfortable enjoyment, whether it be in relations, estate, health, or friends is a candle lighted by providence for our comfort in this world, and they are but candles, which will not always last: and those that last longest will be consumed and wasted at last; but often it falls out with them as with candles; they are blown out before they are half consumed; yea, almost as soon as lighted up; and then we are in darkness for the present.
It is a dark hour with us, when these comforts are put out; but David's faith did, and ours may, comfort us with this, that He that blew out the candle can light up another. "For thou wilt light my candle: the LORD my God will enlighten my darkness." That is, the Lord will renew my comforts, alter the present sad estate I am in, and chase away that trouble and darkness which at present lie upon me; only beware of offending Him, at whose beck your lights and comforts come and go.
Hannah waited humbly upon the Lord for the blessing of children, and the Lord remembered her, He enlightened her condition with that comfort when she was a lamp despised. There is no comfort you have lost, but God can restore, yea, double it in kind, if he sees it convenient for you.
from Facing Grief by John Flavel