'cling firmly' is correct and usable in written English.
You can use it to express staying resolute in one's beliefs or actions. For example: "Despite the difficulties she faced, she clung firmly to her goal of finishing college."
People cling firmly to the belief in such a reality, with the individual as one small speck on a global spaceship.
This focus on examples of architecturally progressive sacred buildings means that faiths which still cling firmly to traditional building styles and ideas such as Islam and Hinduism, for example–do not feature very prominently in this book.
Cling firmly to the way things should be on everything from how tasty the turkey turns out to how well-behaved your children will be during family gatherings.
On the other hand, history is also messy, more so than this show, which clings firmly to its genre.
In a letter to the composer Franz Liszt, he heralded a time when "we shall abandon our habit of clinging firmly to the past, our egotistical concern for permanence and immortality at any price".
With rhetoric clinging firmly to that of compassion and tradition, he asserted that Britain "will continue to show the world that this country is a country of extra compassion, always standing up for our values and helping those in need".
Japan's governing Liberal Democratic Party roared to victory in a critical vote for the upper house of Parliament, clinging firmly to the coattails of Junichiro Koizumi, the most popular prime minister in postwar history.
Clinging firmly to the coattails of Junichiro Koizumi, the most popular prime minister in postwar history, Japan's governing party roared to victory on Sunday in a critical upper house parliamentary vote.
The other afternoon these ladies were observed proceeding south on Lexington Avenue in the seventies, at either end of a long rope knotted at intervals of about two feet, and between them were fifteen seven or eight-year olds, each one clinging firmly to a knot.
In fact, they argue that providing misinformed people the truth can exacerbate the problem, because these people just cling more firmly to their false beliefs.
Instead of changing their minds, most will dig in their heels and cling even more firmly to their originally held views.
