“But what does it say? “THE WORD IS NEAR YOU, IN YOUR MOUTH AND IN YOUR HEART”—that is, the word of faith which we are preaching, that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved; for with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation.” – Romans 10:8-10

I am dumbfounded. I know there is a link between belief, faith and our hearts. They seem to be intertwined, beginning with Abram. – see Genesis 15:5-6

“Trust in the LORD with all your heart And do not lean on your own understanding.”- Proverbs 3:5

“Truly I say to you, whoever says to this mountain, ‘Be taken up and cast into the sea,’ and does not doubt in his heart, but believes that what he says is going to happen, it will be granted him. – Mark 11:23

Definition of Doubt
diakrinō – G1252

1. to separate, make a distinction, discriminate, to prefer

2. to learn by discrimination, to try, decide

3. to determine, give judgment, decide a dispute

4. to withdraw from one, desert

5. to separate one’s self in a hostile spirit, to oppose, strive with dispute, contend

6. to be at variance with one’s self, hesitate, doubt

– Strongs Concordance 

Certainly this is something to ponder. To meditate upon and seek His answer. This I know: the condition of our hearts is the key. How is your heart? What do you think the connection is?