As you said these days and the idea of yin-yang, @rok-sivante! Darkness cannot exist without clarity, sweetness without bitterness. In the human being also converge the two forces and energies: positive and negative. We are that stem that rises and expands its branches in different senses without ceasing to be of the same trunk and the same roots. Only if we have known the salt of tears of sadness will we know how to differentiate them from the candy they have when it is one of happiness. Only I, who have known the fall, the sadness, the discouragement, will be able to get up, smile and feel hope. To look at one face of the moon is not to ignore the other face. On the contrary, knowing the two, I know it completely. So with people! I embrace you