Universal forces means all forces good or bad, favourable or hostile, of light and darkness that move in the cosmos.
The earth is the place of evolution in which all these forces meet and try to manifest and out of their working something has to develop. On the other planes there is not the evolution - there each acts separately according to its own law.
All action, all mental, vital, physical activities in the world are the operation of a universal Energy, a Conscious-Force which is the power of the Cosmic Spirit working out the cosmic and individual truth of things. Each individual is a receptacle of cosmic forces and a dynamo for propagation, there passes from each to each a constant stream of mental and vital energies, and these run too in cosmic waves and currents no less than the forces of physical Nature. All this action is veiled from our surface mind's direct sense and knowledge, but it is known and felt by the inner being.
Even should a hostile force cling to its reign
And claim its right's perpetual sovereignty
And man refuse his high spiritual fate,
Yet shall the secret Truth in things prevail.
For in the march of all-fulfilling Time
The hour must come of the Transcendent's will.