An address to professor A.G.Kusraev on the occasion of his 60th birthday, which includes descriptions and statements of his main results in subdifferential calculus and Boolean-valued analysis: the method of general position, formulas for subdifferentials in the most wide statement, the method of Boolean-valued representation of algebraic systems, Boolean-valued representation of lattice-normed spaces, bounded operators, and Maharam operators, injective Banach lattices, etc.