What is the ultimate goal of a human according to Bible? Bible contains several aspects. The best among them for humans is the guidance for conduct. It also instructs a way to live with honesty.
I'm confused about the ultimate goal of living a life according to the Bible. Is it reaching heaven or reaching God or unifying with god?  I'm interested to know whether the Bible explicitly says anyone among the three (I mentioned)  as ultimate.
Else if the Bible explicitly mentions any other one as the ultimate goal, please mention it.
One of the most famous answers to this question comes in the Westminster Shorter Catechism, question 1:

Q1. What is the chief end of man?
A. Man’s chief end is to glorify God, and to enjoy him for ever.

If you look there, they highlight 1 Corinthians 10:31, Romans 11:36, and Psalm 73:25-28.
I believe this is a typical answer to the question from a Reformed perspective.