There is liberal permission for what to ask of God. "'Ask, and it will be given to you; . . . for everyone who asks receives'" (Mt 7:7,8). Your Father will "give good things to them that ask him: (:11). "In everything by prayer and supplication with thanksgiving let your requests be made known to God" (Php 4:6). "You do not have because you do not ask" (Ja 4:2). "You ask and do not receive, because you ask with wrong motives" (:3). "'Your Father knows what you need before you ask him'" (Mt 6:8). Paul "implored the Lord three times that it might leave me" (2Co 12:8) but God said 'My grace is sufficient for you'" (:9). "If our heart does not condemn us, we have confidence before God; and whatever we ask we receive from Him" (1Jn 3:21-22).
Therefore "if we ask anything according to His will, He hears us. And if we know that He hears us in whatever we ask, we know we have the requests which we have asked from Him" (1Jn 5:14-15). Then do like Paul who said "I believe God that it will turn out exactly as I have been told" (Ac 27:25). "We who have believed enter that rest" (Heb 4:3). "'Do not fear or be dismayed . . . for the battle is not yours but God's'" (2Ch 20:15). However we are to "fight the good fight of faith" (1Ti 6:12) because "for without faith it is impossible to please Him" (Heb 11:6). But to fight doesn't mean self-effort. "Are you now being perfected by the flesh?" (Gal 3:3). God works miracles among you by hearing with faith (:5).