How do we know that salvation is found only through Jesus?

The exclusivity of salvation through Jesus Christ is declared clearly in Scripture, particularly in John 14:6, where Jesus asserts, 'I am the way, the truth, and the life: no man cometh unto the Father, but by me.' This foundational truth is further supported by Acts 4:12, which emphasizes that there is no other name under heaven given among men whereby we must be saved. The straight gate signifies that any attempt to approach God outside of Christ—through self-righteousness or works—results in exclusion, as highlighted in Romans 10:3, where those seeking their own righteousness fall short of God's standards.