How can we ever have eternal life?

Throughout history individuals have tried many ways to gain or earn eternal life, but every attempt has been unsuccessful, The Bible Says... "

There is a way which seems right to a man, But its end is the way of death"
Proverbs 14:12

"He saved us, not on the basis of deeds which we have done in righteousness, but according to His mercy."
Titus 3:5

"For by grace have you been saved by faith; and that not of yourselves, it is the gift of God; not as a result of works, that no one should boast."
Ephesians 2:8,9