To those who love God, to those who are the called according to His purpose.

Romans 8:28
And we know that all things work together for good to those who love God, to those who are the called according to His purpose. 

This is an often rememebered verse, used mostly when bad things happen and beyond our control. This helps believers take solace that God is in full control and that no matter how bad the situation is, God will make things better for us. It is useful to also read the last part of the verse which is "to those who are called according to His purpose". So this applies even more so to those who are involved in doing God's will, following God's command to do something. It is not a verse that covers things we do for ourselves, or circumstances that affect us due to the evils around us. Yes, God does heal and mend sometimes, but perhaps this verse should be used as an encouragement to do God's will and to live "according to His purpose". For when doing so, then we are operating in God's sovereign will and God's will always work out for His good.

All things work together for good to those who love God

Romans 8:28
And we know that all things work together for good to those who love God, to those who are the called according to His purpose. 

This verse has usually used to comfort believers when they are in difficulty, facing struggles and hardships. In a more general sense it says that God is in control of everything. It is His providence rather than any coincidence that we are placed in any situation. We can always make use of the current situation and be a blessing for others, as we yield to God's providence.

Now the Lord says, who formed me from the womb to be His servant

Isaiah 49:5
Now the Lord says, who formed me from the womb to be His servant

We are created by God, even though it is done through physical biological process. Then we are also chosen for His purpose. This realisation that our created purpose is to glorify God leads to tremendous joy in the new discovery for those who really understand it. This will lead to a decrease in interests in worldly things and more focussed toward God. To deliberately go the opposite way is to bring many struggles for ourselves.