There are two types of dedication: poisonous and nonpoisonous. " Poisonous dedication" means dedication with attachment. It is stated in the Prajnaparamita Sutra that good seeds sown with attachment is like poisonous food. It may taste delicious at first, but will cause tremendous pain when the poison takes effect. Similarly, good seeds sown not by actions performed with mind free of clinging, as explained above, may perhaps yield some transitory benefit, but more suffering will ensure and no liberation attained because such actions are deemed defiled phenomena. 

~Depicted from From Believers to Bodhisattva