Understanding what God has done for us in the past and will do for us in the future enables us to live rightly in the present.
Titus 2:11-14 (ESV)
For the grace of God has appeared, bringing salvation for all people (PAST),
training us to renounce ungodliness and worldly passions, and to live self-controlled,
upright, and godly lives in the present age (PRESENT),
waiting for our blessed hope, the appearing of the glory of our great God
and Savior Jesus Christ (FUTURE),
who gave himself for us to redeem us from all lawlessness and to purify
for himself a people (PAST)
for his own possession (FUTURE)
who are zealous for good works (PRESENT).