Well I heard this sentences before: "accept what you can't control", "accept your situation", "accept what you have in life", "acceptance will give you peace". Well I don't what they really mean. For me acceptance means laziness, acceptance means cowardice, acceptance means letting others control you.
If you really know the meaning of life. If you really know that you only have one life are you going to accept what you have if you think you deserve better?
Are you going to accept that you are just a bench player? are you going to accept that you only earn $500 a month? are you going to accept that people are not treating you right? are you going to accept that you have a very small house? are you going to accept the bullying from other people? are you going to accept that some people controls you? are you going to accept that you are not a risk taker? If you accept these kind of things you will regret that you didn't do something to change your situation. You will regret it in the end.
The reason why you are accepting your situation for now is because you don't want to get hurt, you always play it safe, you don't want to get criticized, you are afraid to fight.
If someone pretending to be a genius has told you that you cannot do something great are you going to accept it? Most people accepts it because fear has taken control their mind. Their fear of failure is bigger than their desire to succeed. They are afraid of people laughing at them if they fail. That is why they accept other people's opinions even if their heart is urging them to at least try.
In the end you will regret all the things that you didn't do, you will regret that you just accept your life as it is and didn't do something to make it better. You will regret all the times that you just endure the sufferings that you know in yourself you can do something about it.
One of the biggest lessons in life is appreciate what you have for the moment but don't be afraid to change it. Don't accept that you don't have the power to change your life.