For the souls in purgatory, waiting for eternal happiness and for meeting the Beloved is a source of suffering, because of the punishment due to sin which separates them from God. But there is also the certitude that once the time of purification is over, the soul will go to meet the One it desires.

A Prayer to the Sacred Heart for Those in Purgatory

Most Sacred Heart of Jesus,
remembering the promise of the Resurrection,
I humbly and sincerely offer these prayers and Masses for
(Mention your intentions here…)
and all the departed.
With joy, I thank You
for what we shared in this earthly life.
With hope, I pray this offering
will help them on their journey
to the fullness of life
and happiness with You in Heaven.
Purify them from all that is not holy
so they may dwell in the mystery
of Your perfect love forever.
With blessed anticipation,
I look forward to the coming age,
when, with Your grace,
I shall be united with them again in Paradise.