The Lord directs our steps..

 Proverbs 16:9

A man’s heart plans his way, But the Lord directs his steps.

Sometimes what we don't realize, is that God's will always prevail. In life we may have wishes and plans, things we want to do and achieve, or even to be, but in the end, we will be or will achieve what is within God's will and plans for us. This can be in any area of our lives; in the end, God's will prevail. 

This is because God knows our past, He sees our present and the future. We are only limited only to what we know of the past and the present, as for the future, that remains a mystery for us. This is where the trust comes in, if God has come through for you in the past, saved you from some situations and continues to do so, then you are at ease putting your faith in Him, as you know that what He was able to do for you in the past, He can do for you in the future. However, this doesn't mean you don't need to plan for the future, in fact, the bible tells us to plan, have a vision and then take it to God (Habakkuk 2:2). What happens thereafter, you need to trust that it was part of God's plan (whether it happens as you planned it or not). It is for us to be ok with the outcome as we know that He knows best. What perhaps didn't happen as we thought, what if it was protection, as He can see into the future? Hence, we are encouraged to thank God for both opened and closed doors.