think about the consequences of such a statement... if the rahma of Allah were conditional on being mediated through a "shaykh" then those without access to a shaykh would be denied the rahma of Allah. which means that that the Raham of Allah is confined and limited. that last bit of the syllogism is clearly false, hence you don't need a shaykh to benefit from Allah's grace. The rahma of Allah is universal, unlimited and open to all. the beauty of Islam is that our deen liberates us from priestly beaurocracy of mystics, fakirs and middle-men. through your salat, dhikr and piety you can be a direct beneficiary of Allah's love. you don't need a shaykh.