Max Planck was a religous man in his personal life:
''Planck regarded the scientist as a man of imagination and faith, "faith" interpreted as being similar to "having a working hypothesis". For example, the causality principle isn't true or false, it is an act of faith.''
''He also said: "Both Religion and science require a belief in God. For believers, God is in the beginning, and for physicists He is at the end of all considerations… ''
''On the other hand, Planck wrote, "...'to believe' means 'to recognize as a truth,' and the knowledge of nature, continually advancing on incontestably safe tracks, has made it utterly impossible for a person possessing some training in natural science to recognize as founded on truth the many reports of extraordinary occurrences contradicting the laws of nature, of miracles which are still commonly regarded as essential supports and confirmations of religious doctrines, and which formerly used to be accepted as facts pure and simple, without doubt or criticism. The belief in miracles must retreat step by step before relentlessly and reliably progressing science and we cannot doubt that sooner or later it must vanish completely."[30]'' - Wiki.
This is basically the foundation of his personal belief in God and the concept of conscious intelligence underlying physics.
