Why am I telling you this? Because, we are all sustaining to maintain our way of life, our beliefs, our loves, our hearts desire. Sustaining helps us survive events in our lives that are unexpected. Maintaining reminds us these events are but part of living.
Start at age 3 with a focus on articulating thoughts (logic/reason) and feelings (motivation/emotion). Model this articulation as a habit and expect this articulation habit. Ask and listen.
Though your feet and back are in pain, the key is in the identification of your passion. Your passion calms your stress and soothes your back ache. Your passion allows you to unwind. It feeds you rather than draining you.