The best tip!

So the other night i was at work waiting a few tables and hangin out. A young man and his father were having lunch and enjoying the day. When they left they left two bucks and a little card. On this card was a little messagge... "A day hemmed in prayer is less likely to unravel" then there was a verse.... "So let us come boldly to the throne of our gracious God. There we will receive His mercy, and we will fund grace to help us when we need it... Heb.4:16" i wonder what it means. Anywho thank you!