More often than not, for you to enjoy peace, you must wrestle or battle against several factors, both physical and spiritual. You have to contend with both internal and external forces,like fear, procrastination, discouragement, criticism, competitions, lack of resources and so on. 
Having a mindset that is prepared for all these is therefore important if you will ever win in life. Whenever you set out to achieve anything, make up your mind to overcome every challenge you will encounter. This is called the Winning Mentality. You have got to have it, otherwise you will always give up easily. 
You will have to sustain the mentality throughout your lifetime because if you are moving forward, you will keep setting higher goals, so the cycle keeps repeating itself. So get the winning mentality by all means. 
God bless us all. 
Good morning!