Be courageous !!!

Efforts always yield results - none of your efforts can be done in vain

None of your efforts can be done in vain; even if for the moment you do not succeed, all you are trying to achieve is retained for later. One day, all the efforts you have made will ask Heaven for their fulfillment, and Heaven will grant them, because that is the law.
So do not waste your time in useless comparisons thinking: "Such and such who do not do much, everything succeeds, while I exhaustively exhaust myself at work. In fact, those people who seem to you unfairly privileged had made a lot of effort in their past lives. They seem to you to succeed easily, and so much better than you, but they have earned it through these efforts. No success is possible if you have not already learned and worked. Everything is a question of effort and time. So, be concerned only to be sincere and persevering: even the forces of nature will one day contribute to your success, because they are faithful and truthful.