Charles Haddon Spurgeon said this quote

He who has two grounds of trust is lost! He who relies upon twosalvations, and cannot say of Christ, “He is all my salvation and all my desire,” that man is not only in danger of beinglost, but he is already condemned; because, in fact, he believes not on the Son of God! He is not alive to God at all, but rests partly on the Cross, and then in some measure on something else.