Self-esteem refers to what we think and feel about ourselves, while self-worth is recognizing that we are greater than our attributes and of incomprehensible worth. Physical development involves the growth of the body itself, while physiological development refers to increases in bodily functions over time, such as building muscle strength or improving oxygen transfer. Psychological matters are mental or emotional rather than physical, intellectual involves thinking and understanding ideas, spiritual relates to thoughts and beliefs rather than the physical, and social means how things relate to society and its organization.