"confident in the knowledge" is a valid and commonly used phrase in written English.
It can be used in a variety of contexts, typically to express someone's confidence or assurance in their understanding or awareness of something. Example: "After years of studying and researching the topic, Sarah was confident in the knowledge she had gained about climate change."
Israel is confident in the knowledge that it cannot be militarily defeated.
And I believe that they should be able to do their jobs confident in the knowledge that they have the support and trust of the American people.
It took three hours for a 12-mile trek, leaving him exhausted, wet and confident in the knowledge that it could have been a lot worse.
Consistency really is key – customers like to be confident in the knowledge that they will receive a high level of service.
She sits back, confident in the knowledge that her performance is so resolutely hopeless that she doesn't stand a chance of being nominated for any awards at all.
It happens throughout every match — players uncork a first serve with as much force as possible, confident in the knowledge that another chance awaits.
Americans should be confident and secure in the knowledge that, if tragedy should strike in the form of premature death, leaving dependent children, or in the form of a serious disabling illness or accident, which makes work impossible, their incomes will be replaced, thanks to the Social Security benefits they have earned.
Existing alongside this however, is the observation that students remain under confident in the application of knowledge to a clinical context and frustrated with learning approaches which do not appear directly related to improving their competence in this area.
It was when the tsarist state was most confident in its knowledge of the steppe that it committed its gravest errors by alienating Kazak intermediaries and placing unbearable stresses on pastoral nomads.
By learning a subject like science in a way which encourages problem-solving, lateral thinking and critical analysis, the consequence would be a population confident in their knowledge, and the ability to apply it in everyday life.
The results revealed that, when it came to key issues affecting girls and women, those in charge were 'largely not confident in their knowledge of the facts.'" Jones writes.
