As federalism has two or more levels of governments it has dual objectives.
(i) to safeguard and promote unity of the country.
(ii) and to accommodate regional diversity.
=> These two aspects are crucial for the institution and practice of federalism. The government at different levels should agree to some rules of power sharing.
=> They should also trust that each would abide by its part of agreement.
Hence, an ideal federal system has both aspects i.e., • Mutual trust and • Agreement to live together.