How can one attain the faith necessary to activate God's promises?

Faith stands as a crucial and foundational element in Christianity. Numerous facets of the Christian experience, embodied in empirically testable Biblical promises meant to be lived and experienced in this lifetime (on this side of the grave), hinge upon faith as an essential prerequisite. Consequently, addressing the challenge of **cultivating and strengthening one's faith** is of paramount importance. Below are passages stressing the pivotal role of faith: Mark 9:23-24 > **23** And Jesus said to him, “‘If you can’! **All things are possible for one who believes.**” **24** Immediately the father of the child cried out and said, “I believe; help my unbelief!” Hebrews 11:6 >And **without faith it is impossible to please him**, for whoever would draw near to God **must believe** that he exists and that he rewards those who seek him. James 1:5-8 >**5** If any of you lacks wisdom, let him ask God, who gives generously to all without reproach, and it will be given him. **6** **But let him ask in faith, with no doubting, for the one who doubts is like a wave of the sea that is driven and tossed by the wind.** **7** **For that person must not suppose that he will receive anything from the Lord;** **8** **he is a double-minded man, unstable in all his ways**. Mark 11:22-24 >**22** And Jesus answered them, “**Have faith in God**. **23** Truly, I say to you, whoever says to this mountain, ‘Be taken up and thrown into the sea,’ **and does not doubt in his heart, but believes** that what he says will come to pass, it will be done for him. **24** Therefore I tell you, whatever you ask in prayer, **believe** that you have received it, and it will be yours. Matthew 21:21-22 >**21** And Jesus answered them, “Truly, I say to you, **if you have faith and do not doubt**, you will not only do what has been done to the fig tree, but even if you say to this mountain, ‘Be taken up and thrown into the sea,’ it will happen. **21** And whatever you ask in prayer, you will receive, **if you have faith**.” Matthew 13:58 >And he did not do many mighty works there, **because of their unbelief**. Mark 16:17-18 >**17** **And these signs will accompany those who believe**: in my name they will cast out demons; they will speak in new tongues; **18** they will pick up serpents with their hands; and if they drink any deadly poison, it will not hurt them; they will lay their hands on the sick, and they will recover. Matthew 14:28-33 >**28** And Peter answered him, “Lord, if it is you, command me to come to you on the water.” **29** He said, “Come.” So Peter got out of the boat and walked on the water and came to Jesus. **30** But when he saw the wind, he was afraid, and beginning to sink he cried out, “Lord, save me.” **31** Jesus immediately reached out his hand and took hold of him, saying to him, “**O you of little faith, why did you doubt?**” **32** And when they got into the boat, the wind ceased. **33** And those in the boat worshiped him, saying, “Truly you are the Son of God.” 1 Peter 1:6-9 >**6** In this you rejoice, though now for a little while, if necessary, you have been grieved by various trials, **7** so that **the tested genuineness of your faith—more precious than gold that perishes though it is tested by fire**—may be found to result in praise and glory and honor at the revelation of Jesus Christ. **8** Though you have not seen him, you love him. Though you do not now see him, you **believe** in him and rejoice with joy that is inexpressible and filled with glory, **9** obtaining **the outcome of your faith**, the salvation of your souls. Many Christians believe that [Christianity is testable](https://christianity.stackexchange.com/q/97877/61679) , yet the ability to test Christianity is intricately linked to one's capacity to activate its faith-conditioned promises. Consequently, the inescapable question that surfaces is **how to attain a level of faith that meets the requirements for activating God's promises**. To encourage more nuanced and comprehensive responses to this question, I am specifically seeking answers that address the hurdles of attaining faith—particularly the kind capable of **activating God's promises**—for individuals who may not even believe in the existence of God (such as atheists or agnostics) as well as those with worldviews fundamentally at odds with Christianity (e.g., adherents of other religions). Therefore, it is crucial to recognize that the challenge here extends beyond constructing a purely intellectual case for Christianity to convince them of its epistemic possibility. Rather, the aim is to guide individuals toward a level of faith where Biblical promises can be tangibly experienced, not merely theoretically, but actually, in real life. How can this be done?