The most important lesson that I have learned is to trust God in every circumstance. Lots of times we go through different trials and following God's plan seems like it doesn't make any sense at all. God is always in control and he will never leave us.
Yes I think it's really important to acknowledge that Dr. King precisely at the moment of his assassination was re-conceptualizing the civil rights movement and moving toward a sort of coalitional relationship with the trade union movement.