Gita Mahatmyam from Varaha Purana

 Goddess of earth(Bhudevi) asks Lord Vishnu,
'Bhagavan Paramesana,
Bhaktiravyabhichari ni,
Prarabdham bhujyamanasya
Katham bhavati he Prabho. '
Which means,
'O Lord, Parameshwara, Prabhu, how can a person suffering from prarabdham, can get into undivided devotional service. '

Lord Vishnu uvacha(said) ,
Prarabdham bhujyamanopi,
Gitabhyasaratastada ,
Sa muktassa sukhi loke,
Karmana nopa lipyate. '

Which means,
'O Bhudevi, even one is suffering from prarabdham, if that person recites(practices) Gitaji constantly that person ,remains peaceful in this life, not bound by actions, and will be liberated from material bondage. '

We have no control now of our past actions but we can have a plan for our spiritual progress now. That is devotional service.

Lord Krishna says in Gitaji,
" Ananya cetah satatam,
Yo mam smarati nityasah,
Tasyaham sulabhah partha,
Nitya yuktasya yoginah. "
( Gitaji 8,14)
Which means,
'For one who remembers Me always without any deviation, I am easy to obtain , because of his constant devotional service'