To Redeem Time

is to,

Use your time well;
"Use more diligence in the improvement of it; to be diligent and active in duty and preparation."
(Noah Webster's 1828)

Walk in wisdom toward them that are without, redeeming the time. Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer every man.
Colossians 4:5-6