Leadership is a set of skills that can be learned by training, perception, practice and experience over time. Leadership learning is a lifetime activity and good leaders seek out development opportunities that will help them learn new skills. However, I believe souls can be natural born leaders, bringing traits from past lives for example into this world.
Expansion is a concept in yoga that describes both physical and spiritual growth. During the physical practice of yoga, the lungs expand through the breath, allowing vital life-force energy to flow through the body. In turn, yoga poses help the yogi grow physically, mentally and spiritually.
It is on the spiritual level, though, that expansion is most significant. On this level, it means letting go of unconscious contraction, thereby allowing the yogi to be present and aware.