EN
The article presents five transcendental attributes of real existence of being: distinction (aliquid), reality (res), unity (unum), truth (verum) and the good (bonum). These attributes serve as a platform on which first principles of cognition can be rested that underlie the essential claims of metaphysics. These principles can be enumerated as non-contradiction, identity, essentiality and sufficient reason. Whenever any one of them was recognized as a first principle, it began to strongly influence the philosophical construction that was built upon it and shaped its relation to the real world. In the philosophy of Thomas Aquinas a similar role was assigned to transcendental attributes which referred to God and and his relation to the created world. God was the cause of existence of being (causa efficiens), the cause of individuation (causa exemplaris) and the cause determining the purpose of being (causa finalis).