The activity of God, which is transcendent in blessedness, is the activity of contemplation; and therefore among human activities that which is most akin to the divine activity of contemplation will be the greatest source of happiness.
It is the activity of the intellect that constitutes complete human happiness - provided it be granted a complete span of life, for nothing that belongs to happiness can be incomplete.
False happiness is like false money; it passes for a time as well as the true, and serves some ordinary occasions; but when it is brought to the touch, we find the lightness and alloy, and feel the loss.
Happiness is a state of mind. With physical comforts if your mind is still in a state of confusion and agitation, it is not happiness. Happiness means calmness of mind.