For God so loved the world that He gave His one and only Son, that whoever believes in Him shall not perish but have eternal life. – John 3:16 (NIV)
“I tell you the truth, he who believes has everlasting life.” – John 6:47 (NIV)
This is a promise. Because God is love, He will keep His promises. You will have eternal life and experience a personal and eternal relationship with Him.