"Enter ye in at the strait [narrow] gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat: because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it" (Matthew 7:13-14)
"All have sinned, and come short of the glory of God" (Romans 3:23)
"God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life" (John 3:16)
"Believe on the Lord Jesus Christ, and thou shalt be saved" (Acts 16:31)