After more than four decades of participation in nearly all parts of leadership, by identifying, qualifying, training, consulting and developing leaders, to serving, as a leader, for all organizations (large and small), I’ve often been asked, what I think, to be, even the most important consideration of principle, of leading efficiently. I’ve detected, and learned, while it’s likely to teach someone, and furnish them with the needed and necessary abilities, to proceed, wisely, an individual has to begin the process, using a specific type of mindset, and also attitude. If that must be summed – up, only, and essentially, it would be, an individual has to be directed by the core principle, todo, what’s ideal! Bearing that in mind, this guide will try and briefly examine, consider, and discuss, with the mnemonic approach, why understanding human nature. And/ or that which causes us do, what we do, is important and important. Righteous; important; reactive; responsible; effects: It is vital that you proceed, in a righteous fashion, without being self – righteous! Just how would you understand what’s relevant, until/ unless he pays keen attention, to both the strengths and weaknesses, and also the advantages, in addition to negatives? Leading must concentrate on being responsive to needs, goals, priorities, and the mission of this bunch! A leader is accountable for effective leadership preparation, and seeking tactical and action plans, together with sustainability, and realizing consequences, as core components.