'Never ending' in the Bible

Just then a certain teacher of the law of Moses stood up and [attempted to] test Jesus, saying, "Teacher, what must I do to inherit [never ending] life?"

Whatever person tries to gain [everything to satisfy him in] life [here on earth] will lose it [i.e., never ending life]. But whatever person [is willing to] lose [the comforts and security of] his life [here on earth] will preserve it [for eternity].

Then a certain ruler [Note: This man was young and rich. See Matt. 19:16-22] asked Jesus, "Good Teacher, what should I do in order to inherit never ending life?"

who will not receive [back] many times as much [as he left in this life], and never ending life in the coming age."

but those who are considered worthy of gaining that age [i.e., the future, never ending state] and the resurrection from the dead, neither marry nor are given away in marriage.

[But], by holding out steadfastly, you will gain your life. [Note: This means either "preserve your earthly life," or "attain never ending life"].