You can know for sure you’re saved!

“These things I have written to you who believe in the name of the Son of God, so that you may know that you have eternal life.” (1 John 5:13 NASB)

Draw near with full assurance 

“let us draw near with a sincere heart in full assurance of faith, having our hearts sprinkled clean from an evil conscience and our bodies washed with pure water.” (Heb. 19:22 NASB)

He who has the Son has eternal life

“And the testimony is this, that God has given us eternal life, and this life is in His Son. He who has the Son has the life; he who does not have the Son of God does not have the life.” (1 John 5:11-12 NASB)

“Truly, truly, I say to you, he who believes has eternal life.”John 6:47 NASB)

Therefore…

“… I know whom I have believed and I am convinced that He is able to guard what I have entrusted to Him until that day.” (2 Tim. 1:12 NASB)