The mission of art is not to copy nature, but to express it (Balz).
The Judaica is not Judaism but expresses through artistic expression some of his themes, which also belong to the humanity general heritage and to the philosophy common to each human being.

The spirituality, the relationships with others, the relationship with the Divine, the strength and the weakness, the wealth and the poverty, the joy and the sadness, the hope and the despair, the vanity and the humility, the beautiful and the ugly, the harmonious and the disproportionate, the right and the wrong, the success and the failure, the love and the hate, the order and the disorder, the loyalty and the betrayal, the tolerance and the tyranny.

The diagonal is the shortest path to connect the opposites. This work, draw diagonal, is recurrent in the work of Yaacobi even if he does not limit himself. How to draw a diagonal line between day and night, how to connect the material to the spiritual, the man and the woman, the finite to the infinite, the light to the darkness ?

How to connect the heaven and the earth, the love and the hate, the creation and the burly hustle at the time to the material? How to draw the diagonal between to give and to take, between the point and the space, between the silence and the cry, between the desert and "Time Square"?

How to express or create the artistic diagonals?

It is the constant research of the painter and artist Yaacobi!

The Diagonal between black and white, it will be a checkerboard. Between heaven and earth it will be a ladder. Between gravity and weightlessness (in the sense of detachment contingencies), this will be the wings.

The child will be the diagonal between the body and the soul when they are in resonance. Life could be the diagonal between “being” and "not being" intelligence will link the more to the less. Humility will connect face to intelligence. The canvas will be the diagonal between the artwork and the artist.

To research the diagonals may be the work of a lifetime and also of an artistic expression.
Diagonal does not negate the opposite, it identifies and connects them. They exist, but remain opposed, and are connected. Through it, they "connexe" know themselves and perhaps recognize themselves.