It is good for me that I have been afflicted - See the notes at Psalms 119:67. Whatever may have been the form of the affliction, it was good for me. The design was benevolent; the result has been my own benefit. This will be the experience sooner or later resulting from all the afflictions of the righteous.
That I might learn thy statutes - That I might be brought more fully to understand what they require; and that I might be led to conform to them. It is implied here
(a) that this is the tendency of affliction; and
(b) that this is an advantage - a good.
Anything that will lead a man to obey God is a blessing and a favor. Whatever leads a sinner to secure the salvation of his soul is a gain to him. No matter what it may cost; no matter what he may be required to give up; no matter to what persecutions and troubles it may expose him; no matter what he may suffer, or how long he may suffer; no matter though poverty, contempt, toil - even the rack or the stake - may be the consequence of his religion - yet it is again to him; and he will be thankful for it in the end - for nothing that can be endured in this life can be compared with the sufferings of the world of despair; nothing on earth can be “compared with the glory which shall be revealed in us in heaven.” See the notes at Romans 8:18.