He can obtain both pain and pleasure from them. Whereas, since the animals do not think, the sorrows arising from the past and the fears and anxieties arising from the future do not spoil their pleasure of the present. And especially if the pleasure is illicit; then it is like an altogether poisonous honey.
That is to say, from the point of view of the pleasure of life, man falls to a level a hundred times lower than the animals. In fact, life for the people of misguidance and heedlessness, and indeed their existence, rather their world, is the day in which they find themselves. From the point of view of their misguidance, all the time and universes of the past are non-existent, are dead. So their intellects, which connect them to the past and the future, produce darkness, blackness for them. And, due to their lack of belief, the future is also non-existent. Furthermore, because they think, the eternal separations resulting from this non-existence continuously produce darkness for their lives.
Whereas, if belief gives life to life, then through the light of belief, both the past and the future are illuminated and find existence. Like present time, it produces elevated and spiritual pleasures and lights of existence for the spirit and heart in respect of belief. There is an explanation of this truth in the ’Seventh Hope’ in the Treatise for The Elderly. You may refer to that. And so, life is thus.