The Rolling Stones got it right at least once. Actually the refrain continues to get it right.
After "You can't always get what you want" three times, it says sometimes you find what you need.
I'm also reminded of the first line of Scott Peck's The Road Less Traveled: "Life is difficult." Realizing life is difficult paradoxically makes it easier. You're not so disappointed when you can't get what you want.
I think it is dangerous to believe you can get whatever you want. When you don't (and you won't always), you'll be tempted to ask what went wrong? Whose fault is this? That won't be a pathway towards wisdom and calmness.
The Gospel says we can indeed find what we need, but our trouble is likely to be that we don't want it. (And yes, I know the Rolling Stones had no intention of proclaiming the Gospel in their song. I'm doing to them what often gets done to the Bible, yank one bit of it totally out of context).
What do I want that I can't get? One thing, I'd like to be famous. Of course, I wouldn't be conceited about it, I'd use my worldwide fame for good, to encourage people towards God, and to recognize new talent. But God seems to have a plan that will result in his kingdom coming in fullness at the right time, without needing the impact I could make from a global platform of fame and influence. (His creativity and love of mystery are indeed astounding).
Another thing, I don't like to work that hard. I like frittering away time. I'd love it if I could fritter away hours upon hours and not feel bored or guilty when I do. But God, who has so abundantly given me what I need, says one thing I need is to be responsible.