Romans 12:5 "so we, though many, are one body 'in Christ', and individually members of one another.
We that are "in Christ" are all part of the body of believers. Sometimes we may feel insignificant and we may think what we say or do does not matter. We do not get the playing time we think we deserve. Sometimes comparing ourselves with others. Put it another way......let's say that a small part of an Indy 500 racecar breaks and the engine explodes during the race. The race for that driver is over, all because of a small part which really effected the chance for the car to finish, let alone win. If God is using you as part of His kingdom work here on earth, your part is extremely important no matter how small you think it might be. Your "part' cannot be replaced by someone else as your part is unique. If you have not chosen Jesus as your Lord and Savior, hop on board and let Jesus take you for the ride of your life!!