The divine religions are like

The divine religions are like the progression of the seasons of the year. When the earth becomes dead and desolate and because of frost and cold no trace of vanished spring remains, the springtime dawns again and clothes everything with a new garment of life... This is the continuous cycle of the seasons—spring, winter, then the return of spring. But though the calendar changes and the years move forward, each springtime that comes is the return of the springtime that has gone; this spring is the renewal of the former spring.
Springtime is springtime, no matter when or how often it comes. The divine Prophets are as the coming of spring, each renewing and quickening the teachings of the Prophet Who came before Him...
 Now the people of religion have lost sight of the essential reality of the spiritual springtime. They have held tenaciously to ancestral forms and imitations, and because of this there is variance, strife and altercation among them.
Therefore, we must now abandon these imitations and seek the foundation of the divine teachings; and inasmuch as the foundation is one reality, the divergent religionists must agree in it so that love and unity will be established among all people and denominations.


`Abdu'l-Bahá: The Promulgation of Universal Peace P.127