Parousia means literally ‘presence’, and the two words together imply that our Lord’s return will involve the personal presence of one now absent, the visible appearing of one now unseen.
Related
John 3:16 CSB
For God loved the world in this way: He gave his one and only Son, so that everyone who believes in him will not perish but have eternal life.
Similar
We don’t know all that being made like Jesus means. What we do know is it will be better than we could ever hope or imagine, and it will be the occasion for an eternal lifetime of praise, worship, and adoration.
Sanctifying
But when John speaks of the Christian’s eschatological future, there is no uncertainty because it is based on what Jesus Christ has already done. The only reason that this attitude is referred to as a “hope” is that it is still future. It is a certain hope that is merely awaited. — Karen H. Jobes
