We are multi-faceted beings. That is, we have lots of differing desires and personalities, all competing for supremacy. Very few people can say that they are truly living up to all their desires. The pressures of modern life, and our obligations to others mean that we constantly have to make choices between what we truly want, and what we actually go for. This lack of harmony between desires and environment can cause deep feelings of unhappiness and resentment.
Taking time out to discover what you want, and making plans to get it can be useful way of self-mastery. Working logically through what you desire and what is truly important can resolve a lot of issues.
Goals are important, but forbearance is equally so. There is no true gain without hardship. Iron must undergo tempering in a furnace before it becomes steel. Dough must be kneaded, pounded and baked before it becomes bread. Earth must be ploughed before seeds can be planted.