3 Bible Verses about Life Being Temporary

We, all the while, gazing not on what is seen, but on what is unseen; for what is seen is transient, but what is unseen is imperishable.

For we know that if our tent--that earthly body which is now our home--is taken down, we have a house of God's building, a home not made by hands, imperishable, in Heaven.

But I think it my duty, as long as I live in this 'tent,' to rouse you by awakening memories of the past; for I know that the time for this 'tent' of mine to be put away is soon coming, as our Lord Jesus Christ himself assured me.