修習止觀坐禪法要 1.172

1.172

誓願所行者，須除三障五蓋。如或不除，雖勤用功，終無所益。

Those who practice with vows must eliminate the three obstructions and the five hindrances. If they are perhaps not eliminated, although one exerts diligent effort, in the end there will be no benefit.