Statistics show making "purity pledges" is completely useless.
This is (likely anyway) true.
As making pledges without power, without life cannot succeed.
And Jesus says do not swear (which might , I guess, be similar to do not make pledges)...
However, likewise, when children are raised right, they will not depart from it when they are old.
This is God's Promise, not a man's promise and not a man's pledge,
not dependent on men or man or church,
but on God's Promise in Christ Jesus,
and HE KEEPS and PROTECTS and HONORS HIS WORD.
That does not fix all the broken lives, but can greatly affect
children growing up,
to give them a much greater joy and peace and righteousness
than
most adults ever see in their lives, if ever.
and without condemnation of anyone in Christ Jesus.
So then the purpose? the motive ? the plan ?
Salvation as God says.
Peace, Joy, and Righteousness for all ekklesia, as God gives and says.
LIFE ! as God says, in Jesus, and not the sad state of man's religious efforts without God.
Keep good company, fwiw, as bad company corrupts good morals.
Good company is hard to find.
A good husband or wife or brothers and sisters in Christ is a treasure - a gift from God, precious in GOD'S SIGHT,
more to be desired than gold,
yes, more than much fine gold....