The bible says in John 14:6,"Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me".
There are guarantee when you pray with the name Jesus, because he has made it clear, he is the way, the truth and life!
I urge every christians today "pray without Ceasing" 1 thessalonians 5:17
Thanks @gameoutcome
RE: Praying in His Name Guarantees Answers