The darker the cave of life we enter (hard times, temptations, etc.), the more brilliant the speck of light (the light at the end of the tunnel or The Answer) is at the first glimpse of the exit. However, certain people have a promise that the darkness will not get more gloomier/overwhelming.   They may have to endure the treachery of the inside of the cave itself for a while (curve-balls of life preventing you from getting out of your situation), but they are promised the exit to their cave of life is definitely within reach.

No temptation has seized you except what is common to man. And God is faithful; he will not let you be tempted beyond what you can bear. But when you are tempted, he will also provide a way out so that you can stand up under it. – 1 Corinthians 10:13

Those certain people are Christians.  This verse places the degree of temptation and the provision of a solution solely on God – “And God is faithful; he will not….he will also provide a way out…” This is a matter of faith as a belief in God’s faithfulness to provide. Another way of saying - belief in God's Faithfulness - is Trust.  Believers should Trust in His faithful provision(s), especially when Scripture says a way will be provided for you "SO THAT you can stand up under it". Ah!  The joys (James 1:2-4) of being refined more and more into the image of Christ - from glory to glory - And we, who with unveiled faces all reflect the Lord's glory, are being transformed into his likeness with ever-increasing glory, which comes from the Lord, who is the Spirit. - 2 Corinthians 3:18  

So, the next time you know you are in a dark Cave of Life...

Trust in the LORD with all your heart and lean not on your own understanding; in all your ways acknowledge him, and he will make your paths straight. - Proverbs 3:5-6