Not only is grace irresistible, it must be irresistible - D. Martyn Lloyd-Jones

‎”Not only is grace irresistible, it must be irresistible. For if grace were not irresistible no one would ever have been saved… The idea that grace presents itself to us, but that the final choice remains with us as to whether we are going to take advantage of it or not, is not only a contradition of the verse we are considering, it is a contradiction of the entire biblical teaching concerning the way of salvation.” 

– D. Martyn Lloyd-Jones
Romans Assurance