Concentrate on a single method or school in order to achieve success

We may take up any Dharma for practice as long as it is agreeable to our interest and inclination, and since every Dharma is perfect and complete, therefore in the cause of cultivation, we should not think of changing from one Dharma to another, nor should we think that a certain Dharma may be more superior or inferior to the others. As no medicine may be called ... bad as long as it can cure, likewise, no Dharma may be said to be ... low as long as it is adaptable to its followers. (Hsu Heng Chi, What's Buddhism?, p. 62.)