The Bible has the answers to your many questions!

Mt. 18:11," For the Son of Man has come to save that which is lost."

Jn.10:9," I am the door. If anyone enters by Me, he will be saved..."

Eph.2:8 "For by grace you have been saved through faith..."

Lk.13:3," I tell you, no; but unless you repent you will perish..."

Rms. 10:9," that if you confess with your mouth the Lord Jesus... You will be saved."

Heb. 5:9," ...He became author of eternal salvation to all who obey Him."

Acts 2:40-42," ...and they continued steadfastly..."