Force is the element which drives away fear. It is the element which gives you tact and address. As you increase it, you can stand and assert yourself before those who in the past have browbeaten you, bullied you, and overcome you by force of stronger will tyrannically exercised. This is the power constantly used against those who are trying to get up in the world. No matter how good, how amiable, how well-disposed you are toward others, if you lack force, if you lack the ability to assert yourself or get justice, if your wits are driven out of you temporarily by a snub, a frown, a sneer, you cannot succeed in the world; you cannot have that to which you are justly entitled. Force is that quality or element which, in case you receive a sudden shock, a misfortune, an unexpected failure, causes you quickly to rally, get yourself together again, forget all the trouble, in new efforts to push ahead. In the physical world there will always be accidents and failures. Houses will decay or burn; business may not succeed for a time according to our hopes; friends may prove wanting in the season of need. Trials must come in every phase of life, until they cease to be trials through your growing force. What now may be to you as mountains will in the future , through getting more force, be but as mole-hills. You may not today fear the person or thing which in your childhood was a terror to you Why? Because you have more force, more wisdom; and wisdom and force mean the same thing. But wisdom is seeing by the mind’s eye. It is not the knowing or holding in memory of a store of assertions or opinions gathered from books or men.
–Prentice Mulford, The Gift of Understanding