Solemni hac liturgia

Solemni hac liturgia ("This solemn liturgy") is a motu proprio issued by Pope Paul VI on 30 June 1968.

It was forwarded to Pope Paul VI, who expressed his acknowledgement and further amended it before publishing in Solemni hac liturgia.

The Church, most assuredly, has always the duty to carry on the effort to study more deeply and to present, in a manner ever better adapted to successive generations, the unfathomable mysteries of God, rich for all in fruits of salvation.

But at the same time the greatest care must be taken, while fulfilling the indispensable duty of research, to do no injury to the teachings of Christian doctrine.

[1] In particular, four Marian teachings are emphasised: the virgin birth of Christ, the Theotokos, the Immaculate Conception, and the Assumption of Mary.